Te-qing or single sonorous stone cut in the shape of a carpenter's square, carved out of nephrite jade in gray white with blue hue, very thin relief and carved design of ancient monster face and a bat under the triangle. With well-carved, good...

Design for carved Portland stone sunk raised relief (theme of this relief is the history of applied mathematics. The figures are arranged around the signs of the zodiac: Chinese gods of culture Fu-Hsi and his sister Nu-Kanas with a carpenter's...